[Webkit-unassigned] [Bug 190574] New: -webkit-overflow-scrolling: touch breaks if z-index < 0

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=190574

            Bug ID: 190574
           Summary: -webkit-overflow-scrolling: touch breaks if z-index <
                    0
           Product: WebKit
           Version: Safari 10
          Hardware: iPhone / iPad
                OS: iOS 10
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: yeti.or at gmail.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

if container has -webkit-overflow-scrolling: touch
and some child has position:absolute z-index: -1 ( actually any z-index < 0 )
then all content of container becomes invisible if you change display from none to block

example to reproduce: https://jsbin.com/cizupemowo/7/edit?output

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